SAN FRANCISCO (Reuters) - A key Uber investor testified on Thursday that the company's board received assurances that due diligence had turned up no problems with a self-driving car startup which Uber acquired, differing from testimony by Uber's former...

SAN FRANCISCO (Reuters) - A key Uber investor testified on Thursday that the company's board received assurances that due diligence had turned up no problems with a self-driving car startup which Uber acquired, differing from testimony by Uber's former chief executive.